The Dormer Pramet C70 corner rounding cutter is a compact, four-flute tool engineered for precise corner rounding and chamfer milling in a wide range of metals. Designed for machinists who value rigidity and reliable results in tight setups, it delivers consistent radii and clean finishes.

• Shank: flatted 20 mm shank for secure clamping and reduced runout
• Diameter: 28 mm cutting diameter for efficient corner rounding
• Corner Radius: 9 mm profile radius for predictable, smooth edges
• Overall Length: 85 mm for accessible machining in confined pockets
• Number of Flutes: 4 flutes enabling steady cutting and good surface finish
• Material and Grade: cobalt-based HSS-E (Dormer Pramet C70) with a bright finish for high-temperature wear resistance
• Finish: bright finish that aids chip control and inspection
• Cutting Geometry: optimized helix and rake angles tailored for chamfer milling
• Applications: suitable for steel, cast steel, stainless steel, cast-iron, wrought, cast aluminium, copper and copper alloys, and high-temperature alloys
• Standards: built to Dormer standard for consistent performance and compatibility with standard tooling setups

This corner rounding cutter is ideal for engineers and machinists performing precise edge treatments on brackets, housings, and structural components. The cobalt-based HSS-E composition delivers durability under demanding cutting conditions, while the extra-short form enhances rigidity in tight cavities and short-stroke milling operations. With a 9 mm radius, it creates durable, uniform corners that stand up to assembly and wear, making it a reliable choice for both production runs and repair work across a variety of materials.